ILLUMINATION OPTICAL SYSTEM AND IMAGE PROJECTION APPARATUS

摘要

The illumination optical system includes a first optical system configured to shape a light flux from a light source such that a light flux cross-sectional shape of the light flux becomes close to a rectangular shape of an illumination surface, a second optical system having an optical axis tilted with respect to a normal to the illumination surface and configured to introduce the light flux from the first optical system to the illumination surface, and a light-transmissive element having an entrance surface and an exit surface respectively forming mutually different angles with respect to the optical axis of the second optical system in a plane including the optical axis of the second optical system and the normal to the illumination surface. The light-transmissive element is disposed between the first optical system and the illumination surface.

主权项

1. An illumination optical system comprising:
a first optical system configured to shape a light flux from a light source such that a light flux cross-sectional shape of the light flux becomes close to a rectangular shape of an illumination surface; a second optical system having an optical axis tilted with respect to a normal to the illumination surface and configured to introduce the light flux from the first optical system to the illumination surface; and a light-transmissive element having an entrance surface and an exit surface respectively forming mutually different angles with respect to the optical axis of the second optical system in a plane including the optical axis of the second optical system and the normal to the illumination surface, wherein the light-transmissive element is disposed between the first optical system and the illumination surface.